Method for obtaining serving gateway, mobility management node, data gateway, and system

• US 9,848,359 B2
• Filed: 12/05/2014
• Issued: 12/19/2017
• Est. Priority Date: 06/13/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Chen, Jing
• Primary Examiner(s): Chriss, Andrew
• Assistant Examiner(s): Preval, Voster
• Application Number:
  US14/562,548
• Publication Number:
  US 20150085828A1
• Time in Patent Office: 1,110 Days
• CPC Class Codes: H04L 2101/35 containing special prefixes
• CPC Class Codes: H04L 2101/375 Access point names [APN]
• CPC Class Codes: H04L 2101/69 using geographic information, e.g. room number
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04W 36/12 Reselecting a serving backbone network switching or routing node
• CPC Class Codes: H04W 48/14 using user query or user detection
• CPC Class Codes: H04W 8/02 Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
• CPC Class Codes: H04W 8/065 involving selection of the user mobility server

Abstract

The present invention provides a method for obtaining a serving gateway, a mobility management node, a data gateway, and a system. A method for obtaining a serving gateway according to an embodiment of the present invention includes: when a UE is switched from an old-side mobility management node to a new-side mobility management node, sending, by the new-side mobility management node, a domain name resolution request to a domain name system DNS server according to access information of the UE; receiving a hostname of a device returned, according to the domain name resolution request, by the DNS server; obtaining a hostname of a new-side available S-GW; and selecting the new-side available S-GW closest to the device on geographic topology as a new-side S-GW. User service data transmission time delay can be reduced through the method.

Claims

1. A method for obtaining a serving gateway (S-GW), wherein when a user equipment (UE) is switched from an old-side mobility management node to a new-side mobility management node, the method comprises:

sending, by the new-side mobility management node, a domain name resolution request to a domain name system (DNS) server according to access information of the UE, wherein the access information comprises an old-side location area identity of the UE and the domain name resolution request comprises a domain name of an old-side mobility management node formed according to the old-side location area identity;

receiving, by the new-side mobility management node, a hostname of the old-side mobility management node returned, according to the domain name resolution request, by the DNS server;

obtaining, by the new-side mobility management node, a hostname of a new-side available S-GW; and

selecting, by the new-side mobility management node, the new-side available S-GW closest to the old-side mobility management node on geographic topology as a new-side S-GW according to a part, in the hostname of the old-side mobility management node, denoting a geographic topological relationship and a part, in the hostname of the new-side available S-GW, denoting a geographic topological relationship.

2. A mobility management node, comprising:

at least one processor; and

at least one memory having a plurality of computer readable instructions stored thereon that, when executed by the at least one processor, cause the at least one processor to;

send a domain name resolution request to a domain name system (DNS) server according to access information of a user equipment (UE), wherein the access information comprises an old-side location area identity of the UE and the domain name resolution request comprises a domain name of an old-side mobility management node formed according to the old-side location area identity;

receive a hostname of the old-side mobility management node returned, according to the domain name resolution request, by the DNS server;

obtain a hostname of a new-side available serving gateway (S-GW); and

select the new-side available S-GW closest to the old-side mobility management node on geographic topology as a new-side S-GW according to a part, in the hostname of the old-side mobility management node, denoting a geographic topological relationship and a part, in the hostname of the new-side available S-GW, denoting a geographic topological relationship.

3. The mobility management node according to claim 2, wherein the mobility management node is a serving general packet radio service support node (SGSN) or a mobility management entity (MME).

4. A system for obtaining a serving gateway (S-GW), comprising:

a mobility management node and a domain name system (DNS) server;

wherein the mobility management node is configured to;

send a domain name resolution request to a domain name system (DNS) server according to access information of a user equipment (UE) that switches from an old-side mobility management node to the mobility management node, wherein the access information comprises an old-side location area identity of the UE and the domain name resolution request comprises a domain name of an old-side mobility management node formed according to the old-side location area identity,

receive a hostname of the old-side mobility management node returned, according to the domain name resolution request, by the DNS server;

obtain a hostname of a new-side available S-GW; and

select the new-side available S-GW closest to the old-side mobility management node on geographic topology as a new-side S-GW according to a part, in the hostname of the old-side mobility management node, denoting a geographic topological relationship and a part, in the hostname of the new-side available S-GW, denoting a geographic topological relationship.